Internal-combustion engine.



C. FISHER.

NTERNAL COMBUSTION ENGINE.

APPLlcATloN FILED JULY 3o. 1912.

m2395264., Patented July 3, 1917.

2 SHEETS-SHEET l.

C. FISHER.

INTERNAL COMBUSTIUN ENGINE.

APPLICATION FILED IuLY 30. 1912.

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is applicable to other typesof engine, such CHARLES FISHER, or CHICAGO, ILLINOIS.

1 INTERNAL-COMBUSTION ENGINE.

Specification of Letters Patent.

Patented July 3, 1917.

Application filed July 30, 1912. Serial No. 712,324.

To all whom t mayconcem: y

Be it known that I, CHARLES FISHER, a citizen of the `United States, residing at Chicago, inthe county of Cook and State of Illinois, lhave invented a new and useful Improvement in Internal-Combustion Engines, of which the following is a specification.

Myinvention relates particularly to internal combustion engines; and my primary object is to provide an improvedconstruction and arrangement, whereby the valve mechanism of the engine will operate with smoothness and precision, with a consequent improved operation of they engine as a whole. A further object is to provide for increased durability of the engine land valve mechanism and to obviate danger of the mechanism getting out of order.

`The invention is illustrated inthe accompanying drawings in the form of a fourcylinder,` four-cycle engine of the singleacting type. It `will be understood, however, that this embodiment has been selected by way of illustration of a four-cycle engine. The invention, in its broadest aspect,

as a two-cycle engine.

In the drawings Figure 1 represents vertical Isectional view of an internal combustion engine constructed in accordance with my invention, the section being taken as indicated at line 1 on Fig. 5; Figs. 2 and2 represent broken sectional views through the admission and exhaust valves, respectively, the sections being taken `as indicated at the lines 2 and y2a on Fig. 5; Figs. Band 3ay represent sections through the admission and exhaust valves at the plane of the third cylinder `of the engine, the section being taken as indicated at the lines 3 and 3a on Fig. 5; Figs. 4 and i 4a represent, respectively, sections through the admission and exhaust valvesy at the plane of the fourth cylinder, the section being taken asy indicated at lines 4 and 4a on Fig` 5; Fig. 5 ahorizontal section taken as indicated at line 5 onFig. l.; andl Fig. 6a broken sectional view, showing a modification. i .y n ,x Y

`In the embodiment illustratedythe invenf tion comprises ya Iseries of ycylinders A', A,

A", andA; pistons B (one shown) for said cylinders;` rotary tubular admission and eX- haust valves C, C; acrank-shaft D connected by connecting reds D to the pistons;

and a crank-case E which aiiords a base for the machine and which is surmounted by the cylinders.

In the vertical type of machine here shown, the admission and exhaust valves are horizontally disposed and flank the upper portions of the cylinders, being mounted in cylindrical valve-casings 1 which flank the upper portions of the cylinders and are preferably cast integral therewith. At the front vertical end of the engine is provided a gear-case- 2, the 'body of which is `cast integrally with the engine frame and c vlinders. This gear-case is provided with a removable plate 3. The rotary valves C and C' have closed ends l which project into the gear case 2, and are fitted with gears 5 which are of the same size. Below the gears 5 is mounted, on a pivot 6, a gear or fitted with a pinion 8 which meshes with the gear or idler 7, the pinion 8 having onehalf as many teeth as the gears mentioned. From the view shown in Fig. 2, it will be understood that the admission and exhaust valves rotate in the same direction, and at a speed one-half as great as the speed of the crank-shaft.

The other end of the ladmission valve C is litt-ed with a nipple or stuiing-box 9 with which is connected an intake -pipe 10 through which the gaseous mixture is drawn from a carbureter 11. The construction is such that the connecting member 9 which is iixed to the rotary valve C can rotate with relation to the admission pipe 10. The exhaust valve C is provided at its rear end with a union Y or connecting member 12 which receives the exhaust pipe 13. The member 12 is fixed to and adapted to rotate with the'exhaust valve, and the connection is such that the member 12 may rotate with relation to the pipe 13. The engine is shown provided with the usual water-jacket.

' At the upper end of each cylinder is a compression chamber 14- and an ignition device 1 5.' Flanking each chamber 14 `is an admission port 16 and an exhaust port 17. i The admission valve is provided with a series of admission ports 18a, 18?, 18, and

18d. These ports are adapted to register successively with the admissionports 16 of the successive cylinders, and are angularly disposed Awith 'relation to each other.. Preferably, the admission ports are singularly vso separated by spaces of ninety degrees, it being understood that the engine will be so timed that the pistons will operate in succession, so that the torque upon the.- crank-shaft will be as uniform as possible.

The exhaust valve C is provided with a series of exhaust ports 19a, 19h, 19C, and 19d which are adaptedto register successively with the exhaust ports 17 of the successive cylinders. The exhaust ports are angularly disposed with relation to each other, being separated by ninety degree angles. rIhe exhaust port corresponding with each cylinder is so disposed that it will pass the exhaust port 17 before the corresponding admission portcomesinto registration with'the admission port 16. This will be understood from Fig. 1. i

At the front ends of the valve chambers 1,

and within the gear-case 2 are annular bearings 20 adapted to be engaged by the hubs 21 of the gears. Washers 22 are sho-wn interposed' between the hubs and the bearings. The gear-casing plate 3 is shown f equipped with set-screws 23 whosel inner points bear against the central portions of the gears 5, so that close joints will be mainytained` at the bearings 20. In practice, the

gear-case 2` will be kept filled with grease,

,i from which source the rotary valves will be lubricated; and the lubricant will, in turn, tend to prevent the passage of gas into the gear-casing.

In Fig. 1, the position of the parts is such that the first cylinder is about to take in a charge. It will be noted that the port 19a of the exhaust valve C has already closed the exhaust port 17, while the port 18a -is just coming into registration with the admission'port 16. As the piston descends, the charge is drawn into the cylinder, and thereupon' the port 1 8a passes the port 16, so that both the admission and exhaust ports are closed'. On the 11p-stroke of the piston, the charge is compressed; on the next downstroke, the firing takes place; and on the second rip-stroke the products of combustionV are discharged,y the exhaust port 19a in the meantime coming into registration with the` exhaust port' 17, and then closing-.after the piston has completed or practically completed its up-stroke. Thus, the valves are aga-in in they position shown in Fig. 1, readyv for another cycle. After the piston of the first cylinder has completedits first downstroke, the admission portl 18b lcorresponding full registration with the port 16, or in other.

words open the port 16 completely, practiactuated by and moving in timed relation" with the crank-shaft; also that free ingress and egress to and from the cylinders are providedat thelnecessary times; that the ingress and egress ports are eectually closed during the compression and working strokes of the piston, extendedl or substantial bearing surfaces between the rotary valves and 'the encircling walls of the valve chambers serv-ing at such timeto prevent the passage of the gases which are under highpressure; andv that. the valves are durable, act with precision, and are little liable to derangement. It follows that the operation of theengine is improved and comparatively noiseless and that the life o f the engine is increased.

It will be understood, ofcourse, that where the invention is adapted to a twocycle engine, ythe gear vratio between the crank-shaft and the rotary valves will be changed, that is, will become the same.A

In thev modification shown in Fig. 6, theV admission" valve Ca is employed in lieu of the valve C, and the valve-seat,.or sleeve, 1a, is enlarged at its center, as indicated at m, and connected with the admission pipem. The valve isv provided withadmissionports 002 which register with the annular passage whiclil the enlargement affords. A similar expedient may be employed at the exhaust valve, if desired, to enable the gases to be discharged from said valve.

The foregoing detailed description has beeny given'for clearness of understanding only, and no undue limitation shouldy be understood therefrom, but the appended claims should be construed v.as broadly as permissible in view' of the prior art.

What I regard as new and desire to secure by Letters Patent is- 1. In engine of thecharacter set forth, the combination of a plurality of cylinders, a gear-case adjacent an outer cylinder,said gear-case having its innerV wall provided with bearings, rotary admission and exhaust valves extending through said bearings into nectedy withl said plate for-holding the hubs of saidv gears against said bearings, pistons in said cylinders, a crank-shaft connected with said pistons, and gears in said casing connecting 'said Crankshaft with said firstnanied gears.

2. In an engine of the character set forth, the combination of a kplurality of cylinders, pistons therein, a crank-shaft connected With said pistons, a gear-case east integrally with one or' the outer' cylinders and equipped With :L removable plate, said gear-ease having its inner Wall provided with bearings, rotary admission and exhaust valves extending through said bearings into said gear-case,

gears in said gear-case secured to seid r0- tsry elves and having hubs abutting against said bearings, adjustable means ceu'` ried by said plate for holding said hubs against said bearings, and gears in seid geen case serving to transmit motion from the crankshaft to said first-named gears.

CHARLES FISHER.

Vitnesses MABEL A. YOUNG, A. CELLEN.

Copies of this patent may be obtained for five cents each, by addressing the Uommissicner of Patents, Washington, D. C. 

